Electric motor.



No. 754,124. PATENTED MAR. 8, 1904.

D. P. BURDON.

ELECTRIC MOTOR.

APPLICATION FILED JULY 13, 1903.

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PATBNTED MAR. 8, 1904.

D. P. BURDON. ELECTRIC MOTOR.

APPLlOATION FILED JULY 13, 1903.

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ELECTRIC MOTOR.

APPLIOATION FILED JULY 13, 1903.

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fie. 754,124.

UNITED STATES Patented March "8, 1904.

PATENT OFFICE.

DAVIDPATTON BURDON, OF JAoKsoNviLLE, FLORIDA, ASSIGNOR or TWO-THIRDS TOSAMUEL P. HOLMES AND GUSTAVE MULLER, or

JACKSONVILLE, FLORIDA.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 754,124, dated March 8,1904.

Application filed July 13, 1903.

Be it known that I, DAVID PATTON BURDON, a citizen of the United States,residing at J acksonville, in the county of Duval and State of Florida,have invcnted'a new and-useful Electric Motor, .of which the followingis a specification.

The present invention relates to oscillatory motors, and is useful forvarious purposes, such as operating swinging fans and rocking cradles,churns, or the like.

One of the objects of the invention. is to provide a structure of theabove character which is comparatively powerful in action, yet compactin structure, so that it will occupy but very little space, the variouselements, moreover, being simple and entirely accessible should itbecome necessary from any cause to remove and repair or replace thesame.

' It is also the object to provide a structure that can be operated bydifferent and distinct batteries of that class which, if usedcontinuously, will wear out, the-parts being so arranged in thestructure that the different batteries are alternately employed, thusafiording each intervals of rest. The invention, however, is notentirely limited to this particular arrangement, as any direct currentfrom asingle source may be employed, if desired.

The preferred form of construction is illustrated in the accompanyingdrawings, where- Figure 1 is a side elevation of a motor constructed inaccordance with the present invention. Fig. 2 is an elevation of theside opposite that shown in Fig. 1. Fig. 3 is a sectional view throughthe motor. Fig. 4 is a vertical cross-sectional view. Fig. 5 is ahorizontal cross-sectional view. Fig. 6 is a diagrammatic view showingthe circuits and electrical connections between the various elements.

Similar reference characters indicate corresponding parts in all thefigures of the drawings.

In the embodiment illustrated a tubular frame is employed comprisingangularly-disposed wall-sections 10, having their abutted Serial No.165,375 (No model.)

edges detachably secured together by connecting-plates 11 andreinforcing-strips 12. ith in this frame are mounted inwardly-extendingindependentv sets of field-magnets 13 and 14, each magnet consisting ofa pair of electro* magnets, having cores 15 secured at their outer endsto transverse metallic bars 16, which are in turn fastened to the frame,insulationsheets 17 being interposed between said frame and the bars 16.The inner ends of the cores are provided with curved pole-pieces 18, theends of which are spaced apart, said polepieces thereby formingsectional rings within the frame, as illustrated more particularly inFig. 3.

Fastened to the outer sides of the pole-pieces 18 are journal-bracketscomprising face-plates 19, secured by screws 20 to said pole-pieces,posts 21, fastened to the face-plate, and journal-plates 22, secured tothe outer ends of the posts. A rock-shaft 23 extends concentricallybetween the pole-pieces 18 and is supported by journal-screws 24,engaging the ends of the same, said screws passing through the plates 22and normally locked against movement by jam-nuts 25. It will thereforebe evident that the field-magnets are disposed radially with relation tothis rock-shaft. Armature-magnets 26, of soft iron, are carried by therockshaft, being located in the space between the pole-pieces 18. Thesemagnets 26 are connected with a hub 27 by means of arms 28, said hubbeing fastened by a suitable screw 29 to the rock-shaft. Thearmature-magnets are located on opposite sides of said shaft, andtherefore simultaneously coact with the opposed field-magnets of eachset, while alternately coacting with the sets.

Suitably secured to one end of a rock-shaft is a pulley 80, that islocated between the face plate. 19 and the journal-plate 24, but outsidethe frame of the motor. This pulley constitutes the driving element fromwhich power may be imparted to the machine or article to be driven, aswill be readily understood. The opposite end of the rock-shaft 23carries a crank-arm 31, located outside of the frame and to which theswitch mechanism is connected. This mechanism is as follows: Upon oneside of the frame are located upstanding journal-posts 32, formedby theupturned terminals of a metallic strip 33, secured upon a transversemetallic sheet 34. Binding-posts 35 are attached to the opposite ends ofthe sheet 34. In the upstanding posts 32 is journaled a rotary shaft 36,disposed transversely of the frame and projecting beyond the same. Oneend of this shaft carries a fly-wheel 37, to which is fastened one endof a pitman 38, the other end of said pitman being connected to thecrank-arm 31 of the rock-shaft. To the other projecting end of therotary shaft 36 is secured a rotary drum 39, which constitutes oneelement of a switch, said drum having a contact-strip 40 on itsperiphery, which extends partially about the same. It is electricallyconnected with the shaft 36 by means of a metallic plate 41, secured tothe drum and engaging said shaft, and a lug 42, carried by the strip andattached to the plate 41.. As a result, the contact-strip 40 is inelectrical connection with the binding-posts 35 through the shaft 36,the posts 32, the strip 33, and the plate 34. Coacting with the rotarydrum 39 are metallic brushes 43, bearing against opposite sides of thesame and secured to an insulator-disk 44, fastened to one side of theframe, these brushes being provided with binding-posts 45, to each ofwhich one pole of a battery is attached, the other poles of thebatteries being attached to binding-posts 46, secured to the frame onopposite sides of the switch.

VVhile the electrical connections between the various elements mayprobably be made out in Figs. 2 and 3,they will be clearly understood byreferring to Fig. 6. The upper and lower sets 13 of the field-magnetsare electrically connected by a wire 47, while a connection is made fromone set with one of the binding-posts 46 by means of a wire 48, theother set being connected to one of the binding-posts 35 by a wire 49.The horizontal sets of magnets 14 are connected by a Wire 50, and one ofthese sets is electrically connected with the binding-post 46 by a wire51, while the other set is in electrical communication with the otherbinding-post 35 through the medium of a wire 52. As stated in thepreliminary portion of the specification, the motor is preferablyoperated by two separate batteries, and these are designated,respectively, A and B. The battery A has its poles connected with one ofthe binding-posts 46 and one of the brushes by means of the binding-post45, the other battery B being in like manner connected with the othercorresponding posts. Assuming, therefore, the armature in the positionshown in Fig. 6, the rotary member of the switch will be so located thatthe contact-strip will be in engagement with the brush that iselectrically connected with the battery A. Consequently the circuit ofsaid battery will be closed, and the current passing through the variouselectrical connections will energize the field-magnets 13, while theother circuit being broken (the other brush 43 being out of engagementwith the contact-strip) the horizontal magnets 14 will be denergized.The magnets 13 will therefore attract the armature-magnets 26, causingan oscillation of the rock-shaft. This movement will rotate the shaft36, carrying the rotary member of the switch around, so that thecontact-strip will be moved into engagement with the other brush 43While disengaging from the first-mentioned brush. As a consequence, thevertical magnets will be deenergized, while the horizontal magnets willbe energized. A reverse movement of the armature therefore takes place,this movement, however, causing a continued rotation of the upper shaft36. Thus the armature is oscillated and a similar movement may beimparted through the medium of the pulley 30 to any machine or articledriven. While the use of two separate sources of electrical energy ispreferable, especially when supplied from batteries that will wear outif used continually, the invention is not limited in this respect, ascer tain combinations are useful when operated from any source of directcurrent.

From the foregoing it is thought that the construction, operation, andmany advantages of the herein-described invention will be apparent tothose skilled in the art without further description, and it will beunderstood that various changes in the size, shape, proportion, andminor details of construction may be resorted to without departing fromthe spirit or sacrificingany of the advantages of the invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an oscillatory motor, the combination with a rock-shaft, of anarmature-magnet carried by the rock-shaft, field-electromagnetsalternately coacting with the armature-magnet for moving the same, aswitch having elec trical connections with the electromagnets andincluding a rotary member, and an eccentric connection between therock-shaft and rotary member of the switch.

2. In an oscillatory motor, the combination with a rock-shaft, of anarmature-magnet carried by the rock-shaft, field-electromagnets disposedradially with respect to the rock-shaft and alternately coacting withthe armaturemagnet for moving the same, a switch having electricconnections with the electromagnets and including a rotary member, andan eccentric connection between the rock-shaft and rotary member of theswitch.

3. In an oscillatory motor, the combination with a rock-shaft, ofarmature-magnets carried by the rock-shaft and projecting on oppositesides of the same, independent sets of electrically-connectedfield-magnets located radially about the shaft and alternately coactingwith the armature-magnets, a switch having electrical connections withboth sets of magnets and including a rotary member, and a crank andpitman connection between the rock-shaft and rotary member of theswitch.

4:. In an oscillatory motor, the combination with a rock-shaft, ofarmature-magnets carried by the rock-shaft and projecting on oppositesides thereof, independent sets of electricallyconnected field-magnetslocated radially about the shaft and having their inner ends alternatelycoacting with the armature-magnets, a separate source of electricalenergy for each set of magnets, and a common switch for alternatelyconnecting and disconnecting said sources with their respective sets ofmagnets.

5. In an oscillatory motor, the combination with a rock-shaft, ofarmature-magnets carried by the rock-shaft and projecting on oppositesides thereof, independent sets of electricallyconnected field-magnetslocated radially about the shaft and having their inner ends alternatelycoacting with the armature-magnets, a separate source of electricalenergy for each set of magnets, and a common switch for alternatelyconnecting and disconnecting said sources with their respective sets ofmagnets, said switch including a rotary member driven from therock-shaft.

6. In an oscillatory motor, the combination with a rock-shaft, of anarmature-magnet carried thereby, a field-magnet coacting with thearmature-magnet, one of said magnets being an electromagnet, a rotaryshaft, a crank-arm attached to the rock-shaft, a pitman connectionbetween the crank-arm and the rotary shaft, and a switch havingelectrical connection with the electromagnet, said switch including arotary member mounted on the rotary shaft.

7 In an oscillatory motor, the combination with a rock-shaft, of anarmature-magnet carried thereby, a field-magnet coacting with thearmature-magnet, oneof said magnets being an electromagnet, a rotaryshaft, a fly-wheel attached to the rotary shaft, a crank-arm fastened tothe rock-shaft, a pitman connecting the crank-arm and fly-wheel, and aswitch having electrical connection with the electromagnet.

8. In an oscillatory motor, the combination with a rock-shaft, ofoppositely-extending armature-magnets carried thereby,field-electromagnets surrounding the shaft and disposed radially withrespect thereto, a rotary shaft, a fly-wheel attached to the rotaryshaft, a crank-arm fastened to the rockshaft, a pitman connectionbetween the crank-arm and fiy-wheel, and a switch having electricalconnections with the field-magnet, said switch comprising a drumattached to the rotary shaft and brushes bearing against the same.

9. In an oscillatory motor, the combination with a frame, ofinwardly-extending field-magnets carried by the frame, a rock-shaftlocated between the inner ends of the field-magnets, an oscillatorymagnet carried by the rockshaft and coacting with said inner ends, and aswitch having electrical connections with the field-magnets andincluding a movable member actuated from the rock-shaft.

10. In an oscillatory motor, the combination with a frame, ofinwardly-extending radiallydisposed sets of field-magnets carried by theframe and having their inner ends spaced apart, a rock-shaft locatedbetween said inner ends, armature-magnets carried by the rockshaft andcoacting with the inner ends, and a switch having electrical connectionswith the field-magnets and including a rotary member driven from therock-shaft.

11. In an oscillatory motor, the combination with a frame, ofinwardly-extending field-magnets secured at their outer ends to theframe, an oscillatory armature arranged between the inner ends of thefield-magnets, a rotary shaft journaled upon the frame, an eccentricconnection between the armature and the rotary shaft, and a switchhaving electrical connection with the field-magnets and including arotary member mounted on the rotary shaft.

12. In an oscillatory motor, the combination with a frame, ofinwardlyeXten ding field-magnets secured at their outer ends to theframe and having their inner ends spaced apart, journal-brackets securedto said inner ends, a rock-shaft journaled in the brackets and extendingbetween the inner ends of the fieldmagnets, and armature-magnets carriedby the rock-shaft and coacting with said inner ends.

13. In an oscillatory motor, the combination with a tubular frame, ofinwardly-extending field-magnets secured at their outer ends to theframe and extending inwardly within the same, said magnets having spacedpole pieces at their inner ends, journal-brackets fastened to the outersides of the pole-pieces, a rock-shaft journaled in the brackets andextending between the pole-pieces, armature-magnets carried by therock-shaft and coacting with the pole-pieces, a switch having electricalconnections with the field-magnets and including a rotary member, andconnections between the rotary member and the rock-shaft for revolvingthe former.

14. In an oscillatory motor, the combination with a tubular framecomprising detachablyconnected sections, of field-magnets located withinthe frame and secured at their outer ends to the sections thereof,pole-pieces attached to the inner ends of the magnets, journal-bracketsfastened to the outer sides of the pole pieces, a rock shaft journaledin the brackets, armature-magnets carried by the rock-shaft and coactingwith the pole-pieces, a rotary shaft journaled on the frame, a flywheelcarried by the rotary shaft, a crankarm connected to the rock-shaft, apitman connection between the crank-arm and fly- Wheel, a switch havingelectrical connections my own I have hereto alfixed my signature inW1tl1 the field-magnets, said swltch comprising the presence of twoWitnesses.

a drum mounted on the rotary shaft and having a contact-piece, andbrushes coacting With DAVID PATTON BURDON 5 the drum and alternatelyengaging the con- Witnesses:

tact-piece. L. A. SHIPMAN,

In testimony that I claim the foregoing as GEO. W. THOMAS, J 1x

